/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.l2j.gameserver.datatables;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

import javolution.util.FastList;
import javolution.util.FastMap;
import net.sf.l2j.database.L2DatabaseFactory;
import net.sf.l2j.gameserver.model.L2EnchantSkillLearn;
import net.sf.l2j.gameserver.model.L2PledgeSkillLearn;
import net.sf.l2j.gameserver.model.L2Skill;
import net.sf.l2j.gameserver.model.L2SkillLearn;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.model.base.ClassId;

/**
 * This class ...
 * 
 * @version $Revision: 1.13.2.2.2.8 $ $Date: 2005/04/06 16:13:25 $
 */
public class SkillTreeTable 
{
	private static Logger _log = Logger.getLogger(SkillTreeTable.class.getName());
	private static SkillTreeTable _instance;
	private Map<ClassId, Map<Integer, L2SkillLearn>> _skillTrees;
	private List<L2SkillLearn> _fishingSkillTrees; // all common skills
	// (teached by Fisherman)
	private List<L2SkillLearn> _expandDwarfCraftSkillTrees; // list of
	// special
	// skill for dwarf
	// (expand dwarf
	// craft) learned by
	// class teacher
	private List<L2PledgeSkillLearn> _pledgeSkillTrees; // pledge skill list
	private List<L2EnchantSkillLearn> _enchantSkillTrees; // enchant skill

	// list
	public static SkillTreeTable getInstance() 
	{
		if (_instance == null)
			_instance = new SkillTreeTable();
		return _instance;
	}

	/**
	 * Return the minimum level needed to have this Expertise.<BR>
	 * <BR>
	 * 
	 * @param grade
	 *            The grade level searched
	 */
	public int getExpertiseLevel(int grade)
	{
		if (grade <= 0)
			return 0;
		// since expertise comes at same level for all classes we use paladin
		// for now
		Map<Integer, L2SkillLearn> learnMap = getSkillTrees().get(ClassId.paladin);
		int skillHashCode = SkillTable.getSkillHashCode(239, grade);
		if (learnMap.containsKey(skillHashCode))
			return learnMap.get(skillHashCode).getMinLevel();
		_log.severe("Expertise not found for grade " + grade);
		return 0;
	}

	/**
	 * Each class receives new skill on certain levels, this methods allow the
	 * retrieval of the minimun character level of given class required to learn
	 * a given skill
	 * 
	 * @param skillId
	 *            The iD of the skill
	 * @param classID
	 *            The classId of the character
	 * @param skillLvl
	 *            The SkillLvl
	 * @return The min level
	 */
	public int getMinSkillLevel(int skillId, ClassId classId, int skillLvl) 
	{
		Map<Integer, L2SkillLearn> map = getSkillTrees().get(classId);
		int skillHashCode = SkillTable.getSkillHashCode(skillId, skillLvl);
		if (map.containsKey(skillHashCode))
			return map.get(skillHashCode).getMinLevel();
		return 0;
	}

	public int getMinSkillLevel(int skillId, int skillLvl) 
	{
		int skillHashCode = SkillTable.getSkillHashCode(skillId, skillLvl);
		// Look on all classes for this skill (takes the first one found)
		for (Map<Integer, L2SkillLearn> map : getSkillTrees().values())
			// checks if the current class has this skill
			if (map.containsKey(skillHashCode))
				return map.get(skillHashCode).getMinLevel();
		return 0;
	}

	private SkillTreeTable()
	{
		int classId = 0;
		int count = 0;
		java.sql.Connection con = null;
		try 
		{
			con = L2DatabaseFactory.getInstance().getConnection();
			PreparedStatement statement = con.prepareStatement("SELECT * FROM class_list ORDER BY id");
			ResultSet classlist = statement.executeQuery();
			Map<Integer, L2SkillLearn> map;
			int parentClassId;
			L2SkillLearn skillLearn;
			while (classlist.next()) 
			{
				map = new FastMap<Integer, L2SkillLearn>();
				parentClassId = classlist.getInt("parent_id");
				classId = classlist.getInt("id");
				PreparedStatement statement2 = con.prepareStatement("SELECT class_id, skill_id, level, name, sp, min_level FROM skill_trees where class_id=? ORDER BY skill_id, level");
				statement2.setInt(1, classId);
				ResultSet skilltree = statement2.executeQuery();
				if (parentClassId != -1) 
				{
					Map<Integer, L2SkillLearn> parentMap = getSkillTrees().get(ClassId.values()[parentClassId]);
					map.putAll(parentMap);
				}
				int prevSkillId = -1;
				while (skilltree.next()) 
				{
					int id = skilltree.getInt("skill_id");
					int lvl = skilltree.getInt("level");
					String name = skilltree.getString("name");
					int minLvl = skilltree.getInt("min_level");
					int cost = skilltree.getInt("sp");
					if (prevSkillId != id)
						prevSkillId = id;
					skillLearn = new L2SkillLearn(id, lvl, minLvl, name, cost,0, 0);
					map.put(SkillTable.getSkillHashCode(id, lvl), skillLearn);
				}
				getSkillTrees().put(ClassId.values()[classId], map);
				skilltree.close();
				statement2.close();
				count += map.size();
				_log.fine("SkillTreeTable: skill tree for class " + classId	+ " has " + map.size() + " skills");
			}
			classlist.close();
			statement.close();
		} 
		catch (Exception e) 
		{
			_log.severe("Error while creating skill tree (Class ID " + classId + "):" + e);
		}
		_log.config("SkillTreeTable: Loaded " + count + " skills.");
		// Skill tree for fishing skill (from Fisherman)
		int count2 = 0;
		int count3 = 0;
		try 
		{
			_fishingSkillTrees = new FastList<L2SkillLearn>();
			_expandDwarfCraftSkillTrees = new FastList<L2SkillLearn>();
			PreparedStatement statement = con.prepareStatement("SELECT skill_id, level, name, sp, min_level, costid, cost, isfordwarf FROM fishing_skill_trees ORDER BY skill_id, level");
			ResultSet skilltree2 = statement.executeQuery();
			int prevSkillId = -1;
			while (skilltree2.next()) 
			{
				int id = skilltree2.getInt("skill_id");
				int lvl = skilltree2.getInt("level");
				String name = skilltree2.getString("name");
				int minLvl = skilltree2.getInt("min_level");
				int cost = skilltree2.getInt("sp");
				int costId = skilltree2.getInt("costid");
				int costCount = skilltree2.getInt("cost");
				int isDwarven = skilltree2.getInt("isfordwarf");
				if (prevSkillId != id)
					prevSkillId = id;
				L2SkillLearn skill = new L2SkillLearn(id, lvl, minLvl, name,
						cost, costId, costCount);
				if (isDwarven == 0)
					_fishingSkillTrees.add(skill);
				else
					_expandDwarfCraftSkillTrees.add(skill);
			}
			skilltree2.close();
			statement.close();
			count2 = _fishingSkillTrees.size();
			count3 = _expandDwarfCraftSkillTrees.size();
		} 
		catch (Exception e) 
		{
			_log.severe("Error while creating fishing skill table: " + e);
		}
		int count4 = 0;
		try 
		{
			_enchantSkillTrees = new FastList<L2EnchantSkillLearn>();
			PreparedStatement statement = con.prepareStatement("SELECT skill_id, level, name, base_lvl, sp, min_skill_lvl, exp, success_rate76, success_rate77, success_rate78, success_rate79, success_rate80  FROM enchant_skill_trees ORDER BY skill_id, level");
			ResultSet skilltree3 = statement.executeQuery();
			int prevSkillId = -1;
			while (skilltree3.next()) 
			{
				int id = skilltree3.getInt("skill_id");
				int lvl = skilltree3.getInt("level");
				String name = skilltree3.getString("name");
				int baseLvl = skilltree3.getInt("base_lvl");
				int minSkillLvl = skilltree3.getInt("min_skill_lvl");
				int sp = skilltree3.getInt("sp");
				int exp = skilltree3.getInt("exp");
				byte rate76 = skilltree3.getByte("success_rate76");
				byte rate77 = skilltree3.getByte("success_rate77");
				byte rate78 = skilltree3.getByte("success_rate78");
				byte rate79 = skilltree3.getByte("success_rate79");
				byte rate80 = skilltree3.getByte("success_rate80");
				if (prevSkillId != id)
					prevSkillId = id;
				L2EnchantSkillLearn skill = new L2EnchantSkillLearn(id, lvl,minSkillLvl, baseLvl, name, sp, exp, rate76, rate77, rate78, rate79, rate80);
				_enchantSkillTrees.add(skill);
			}
			skilltree3.close();
			statement.close();
			count4 = _enchantSkillTrees.size();
		} 
		catch (Exception e) 
		{
			_log.severe("Error while creating enchant skill table: " + e);
		}
		int count5 = 0;
		try 
		{
			_pledgeSkillTrees = new FastList<L2PledgeSkillLearn>();
			PreparedStatement statement = con.prepareStatement("SELECT skill_id, level, name, clan_lvl, repCost, itemId FROM pledge_skill_trees ORDER BY skill_id, level");
			ResultSet skilltree4 = statement.executeQuery();
			int prevSkillId = -1;
			while (skilltree4.next()) 
			{
				int id = skilltree4.getInt("skill_id");
				int lvl = skilltree4.getInt("level");
				String name = skilltree4.getString("name");
				int baseLvl = skilltree4.getInt("clan_lvl");
				int sp = skilltree4.getInt("repCost");
				int itemId = skilltree4.getInt("itemId");
				if (prevSkillId != id)
					prevSkillId = id;
				L2PledgeSkillLearn skill = new L2PledgeSkillLearn(id, lvl,
						baseLvl, name, sp, itemId);
				_pledgeSkillTrees.add(skill);
			}
			skilltree4.close();
			statement.close();
			count5 = _pledgeSkillTrees.size();
		} 
		catch (Exception e) 
		{
			_log.severe("Error while creating fishing skill table: " + e);
		} 
		finally 
		{
			try 
			{
				con.close();
			} 
			catch (Exception e) 
			{
			}
		}
		_log.config("FishingSkillTreeTable: Loaded " + count2 + " general skills.");
		_log.config("FishingSkillTreeTable: Loaded " + count3 + " dwarven skills.");
		_log.config("EnchantSkillTreeTable: Loaded " + count4 + " enchant skills.");
		_log.config("PledgeSkillTreeTable: Loaded " + count5 + " pledge skills");
	}

	private Map<ClassId, Map<Integer, L2SkillLearn>> getSkillTrees() 
	{
		if (_skillTrees == null)
			_skillTrees = new FastMap<ClassId, Map<Integer, L2SkillLearn>>();
		return _skillTrees;
	}

	public L2SkillLearn[] getAvailableSkills(L2PcInstance cha, ClassId classId) 
	{
		List<L2SkillLearn> result = new FastList<L2SkillLearn>();
		Collection<L2SkillLearn> skills = getSkillTrees().get(classId).values();
		if (skills == null) 
		{
			// the skilltree for this class is undefined, so we give an
			// empty
			// list
			_log.warning("Skilltree for class " + classId + " is not defined !");
			return new L2SkillLearn[0];
		}
		L2Skill[] oldSkills = cha.getAllSkills();
		for (L2SkillLearn temp : skills)
			if (temp.getMinLevel() <= cha.getLevel())
			{
				boolean knownSkill = false;
				for (int j = 0; j < oldSkills.length && !knownSkill; j++)
					if (oldSkills[j].getId() == temp.getId())
					{
						knownSkill = true;
						if (oldSkills[j].getLevel() == temp.getLevel() - 1)
							// this is the next level of a skill that we
							// know
							result.add(temp);
					}
				if (!knownSkill && temp.getLevel() == 1)
					// this is a new skill
					result.add(temp);
			}
		return result.toArray(new L2SkillLearn[result.size()]);
	}

	public L2SkillLearn[] getAvailableSkills(L2PcInstance cha) 
	{
		List<L2SkillLearn> result = new FastList<L2SkillLearn>();
		List<L2SkillLearn> skills = new FastList<L2SkillLearn>();
		skills.addAll(_fishingSkillTrees);
		if (skills == null)
		{
			// the skilltree for this class is undefined, so we give an
			// empty
			// list
			_log.warning("Skilltree for fishing is not defined !");
			return new L2SkillLearn[0];
		}
		if (cha.hasDwarvenCraft() && _expandDwarfCraftSkillTrees != null)
			skills.addAll(_expandDwarfCraftSkillTrees);
		L2Skill[] oldSkills = cha.getAllSkills();
		for (L2SkillLearn temp : skills)
			if (temp.getMinLevel() <= cha.getLevel()) {
				boolean knownSkill = false;
				for (int j = 0; j < oldSkills.length && !knownSkill; j++)
					if (oldSkills[j].getId() == temp.getId()) {
						knownSkill = true;
						if (oldSkills[j].getLevel() == temp.getLevel() - 1)
							// this is the next level of a skill that we
							// know
							result.add(temp);
					}
				if (!knownSkill && temp.getLevel() == 1)
					// this is a new skill
					result.add(temp);
			}
		return result.toArray(new L2SkillLearn[result.size()]);
	}

	public L2EnchantSkillLearn[] getAvailableEnchantSkills(L2PcInstance cha) {
		List<L2EnchantSkillLearn> result = new FastList<L2EnchantSkillLearn>();
		List<L2EnchantSkillLearn> skills = new FastList<L2EnchantSkillLearn>();
		skills.addAll(_enchantSkillTrees);
		if (skills == null) {
			// the skilltree for this class is undefined, so we give an
			// empty
			// list
			_log.warning("Skilltree for enchanting is not defined !");
			return new L2EnchantSkillLearn[0];
		}
		L2Skill[] oldSkills = cha.getAllSkills();
		for (L2EnchantSkillLearn temp : skills)
			if (76 <= cha.getLevel()) {
				boolean knownSkill = false;
				for (int j = 0; j < oldSkills.length && !knownSkill; j++)
					if (oldSkills[j].getId() == temp.getId()) {
						knownSkill = true;
						if (oldSkills[j].getLevel() == temp.getMinSkillLevel())
							// this is the next level of a skill that we
							// know
							result.add(temp);
					}
			}
		// cha.sendMessage("loaded "+ result.size()+" enchant skills for this
		// char(You)");
		return result.toArray(new L2EnchantSkillLearn[result.size()]);
	}

	public L2PledgeSkillLearn[] getAvailablePledgeSkills(L2PcInstance cha) {
		List<L2PledgeSkillLearn> result = new FastList<L2PledgeSkillLearn>();
		List<L2PledgeSkillLearn> skills = _pledgeSkillTrees;
		if (skills == null) {
			// the skilltree for this class is undefined, so we give an
			// empty
			// list
			_log.warning("No clan skills defined!");
			return new L2PledgeSkillLearn[0];
		}
		L2Skill[] oldSkills = cha.getClan().getAllSkills();
		for (L2PledgeSkillLearn temp : skills)
			if (temp.getBaseLevel() <= cha.getClan().getLevel()) {
				boolean knownSkill = false;
				for (int j = 0; j < oldSkills.length && !knownSkill; j++)
					if (oldSkills[j].getId() == temp.getId()) {
						knownSkill = true;
						if (oldSkills[j].getLevel() == temp.getLevel() - 1)
							// this is the next level of a skill that we
							// know
							result.add(temp);
					}
				if (!knownSkill && temp.getLevel() == 1)
					// this is a new skill
					result.add(temp);
			}
		return result.toArray(new L2PledgeSkillLearn[result.size()]);
	}

	/**
	 * Returns all allowed skills for a given class.
	 * 
	 * @param classId
	 * @return all allowed skills for a given class.
	 */
	public Collection<L2SkillLearn> getAllowedSkills(ClassId classId) {
		return getSkillTrees().get(classId).values();
	}

	public int getMinLevelForNewSkill(L2PcInstance cha, ClassId classId) {
		int minLevel = 0;
		Collection<L2SkillLearn> skills = getSkillTrees().get(classId).values();
		if (skills == null) {
			// the skilltree for this class is undefined, so we give an
			// empty
			// list
			_log.warning("Skilltree for class " + classId + " is not defined !");
			return minLevel;
		}
		for (L2SkillLearn temp : skills)
			if (temp.getMinLevel() > cha.getLevel() && temp.getSpCost() != 0)
				if (minLevel == 0 || temp.getMinLevel() < minLevel)
					minLevel = temp.getMinLevel();
		return minLevel;
	}

	public int getMinLevelForNewSkill(L2PcInstance cha) {
		int minLevel = 0;
		List<L2SkillLearn> skills = new FastList<L2SkillLearn>();
		skills.addAll(_fishingSkillTrees);
		if (skills == null) {
			// the skilltree for this class is undefined, so we give an
			// empty
			// list
			_log.warning("SkillTree for fishing is not defined !");
			return minLevel;
		}
		if (cha.hasDwarvenCraft() && _expandDwarfCraftSkillTrees != null)
			skills.addAll(_expandDwarfCraftSkillTrees);
		for (L2SkillLearn s : skills)
			if (s.getMinLevel() > cha.getLevel())
				if (minLevel == 0 || s.getMinLevel() < minLevel)
					minLevel = s.getMinLevel();
		return minLevel;
	}

	public int getSkillCost(L2PcInstance player, L2Skill skill) {
		int skillCost = 100000000;
		ClassId classId = player.getSkillLearningClassId();
		int skillHashCode = SkillTable.getSkillHashCode(skill);
		if (getSkillTrees().get(classId).containsKey(skillHashCode)) {
			L2SkillLearn skillLearn = getSkillTrees().get(classId).get(
					skillHashCode);
			if (skillLearn.getMinLevel() <= player.getLevel()) {
				skillCost = skillLearn.getSpCost();
				if (!player.getClassId().equalsOrChildOf(classId)) {
					if (skill.getCrossLearnAdd() < 0)
						return skillCost;
					skillCost += skill.getCrossLearnAdd();
					skillCost *= skill.getCrossLearnMul();
				}
				if (classId.getRace() != player.getRace()
						&& !player.isSubClassActive())
					skillCost *= skill.getCrossLearnRace();
				if (classId.isMage() != player.getClassId().isMage())
					skillCost *= skill.getCrossLearnProf();
			}
		}
		return skillCost;
	}

	public int getSkillSpCost(L2PcInstance player, L2Skill skill) {
		int skillCost = 100000000;
		L2EnchantSkillLearn[] enchantSkillLearnList = getAvailableEnchantSkills(player);
		for (L2EnchantSkillLearn enchantSkillLearn : enchantSkillLearnList) {
			if (enchantSkillLearn.getId() != skill.getId())
				continue;
			if (enchantSkillLearn.getLevel() != skill.getLevel())
				continue;
			if (76 > player.getLevel())
				continue;
			skillCost = enchantSkillLearn.getSpCost();
		}
		return skillCost;
	}

	public int getSkillExpCost(L2PcInstance player, L2Skill skill) {
		int skillCost = 100000000;
		L2EnchantSkillLearn[] enchantSkillLearnList = getAvailableEnchantSkills(player);
		for (L2EnchantSkillLearn enchantSkillLearn : enchantSkillLearnList) {
			if (enchantSkillLearn.getId() != skill.getId())
				continue;
			if (enchantSkillLearn.getLevel() != skill.getLevel())
				continue;
			if (76 > player.getLevel())
				continue;
			skillCost = enchantSkillLearn.getExp();
		}
		return skillCost;
	}

	public byte getSkillRate(L2PcInstance player, L2Skill skill) {
		L2EnchantSkillLearn[] enchantSkillLearnList = getAvailableEnchantSkills(player);
		for (L2EnchantSkillLearn enchantSkillLearn : enchantSkillLearnList) {
			if (enchantSkillLearn.getId() != skill.getId())
				continue;
			if (enchantSkillLearn.getLevel() != skill.getLevel())
				continue;
			return enchantSkillLearn.getRate(player);
		}
		return 0;
	}
}
